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MPortLink
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The code is rewritten from scratch, based on udev

This commit is contained in:
Alexander Zhirov 2023-12-24 00:35:41 +03:00
parent f2fce3463d
commit 78e8b7e491
14 changed files with 356 additions and 376 deletions
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11
.vscode/settings.json vendored
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@ -19,7 +19,14 @@
"cstdint": "c",
"fcntl.h": "c",
"file.h": "c",
"dir.h": "c"
"dir.h": "c",
"mportlink-core.h": "c",
"mportlink.h": "c",
"mportlink-lib.h": "c",
"errno.h": "c"
},
"cmake.configureOnOpen": false
"cmake.configureOnOpen": false,
"editor.rulers": [
80
]
}

2
.vscode/tasks.json vendored
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@ -8,7 +8,7 @@
"-fdiagnostics-color=always",
"-g",
"*.c",
"`pkg-config", "--libs", "--cflags", "mm-glib`",
"`pkg-config", "--libs", "udev`",
"-o",
"${workspaceFolder}/bin/mportlink"
],

6
CHANGELOG.md
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@ -1,6 +1,10 @@
# Changelog
## [0.2.0](https://github.com/AlexanderZhirov/MPortLink/compare/0.1.0...v0.2.0)
## [Unreleased]
### Changed
- The code is rewritten from scratch, based on `udev`
## [0.2.0](https://github.com/AlexanderZhirov/MPortLink/compare/0.1.0...0.2.0)
### Changed
- Creation of links to ports has been moved to the directory `/dev/dongle`

10
CMakeLists.txt
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@ -5,11 +5,11 @@ file(GLOB_RECURSE SRC_FILES_LIST src/*.c)
find_package(PkgConfig REQUIRED)
pkg_search_module(MM REQUIRED mm-glib)
pkg_search_module(UDEV REQUIRED udev)
include_directories(${MM_INCLUDE_DIRS})
link_directories(${MM_LIBRARY_DIRS})
add_definitions(${MM_CFLAGS_OTHER})
include_directories(${UDEV_INCLUDE_DIRS})
link_directories(${UDEV_LIBRARY_DIRS})
add_definitions(${UDEV_CFLAGS_OTHER})
add_executable(${PROJECT_NAME} ${SRC_FILES_LIST})
target_link_libraries(${PROJECT_NAME} ${MM_LIBRARIES})
target_link_libraries(${PROJECT_NAME} ${UDEV_LIBRARIES})

32
README.md
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@ -1,42 +1,24 @@
# MPortLink
[![license](https://img.shields.io/github/license/AlexanderZhirov/mportlink.svg?sort=semver&style=for-the-badge&color=green)](https://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
[![main](https://img.shields.io/badge/dynamic/json.svg?label=git.zhirov.kz&style=for-the-badge&url=https://git.zhirov.kz/api/v1/repos/alexander/MPortLink/tags&query=$[0].name&color=violet&logo=C)](https://git.zhirov.kz/alexander/MPortLink)
[![githab](https://img.shields.io/github/v/tag/AlexanderZhirov/mportlink.svg?sort=semver&style=for-the-badge&color=blue&label=github&logo=C)](https://github.com/AlexanderZhirov/mportlink)
[![linux](https://img.shields.io/badge/Linux-FCC624?style=for-the-badge&logo=linux&logoColor=black)](https://www.linux.org/)
**MPortLink** (*modem port link*) is designed to track connected USB modems and create permanent symbolic links to ports.
MPortLink was developed for direct use of several USB modems when connected to Asterisk telephony, the ports of which were randomly determined by the operating system. The utility allows you to create permanent symbolic links to devices, regardless of the order in which the ports of the USB modem device were defined.
Based on [ModemManager](https://gitlab.freedesktop.org/mobile-broadband/ModemManager).
## Dependency
The installed `modemmanager` is required for use.
## Build
`libmm-glib` library is required for the build. It is called differently in different distributions, for example: `libmm-glib-dev` or `libmm-glib-devel`.
After installing the dependencies, you just need to run the script `build.sh `and `mportlink` will be built in the `build` project directory.
Just need to run the script `build.sh `and `mportlink` will be built in the `build` project directory.
### Manually
```
gcc -Werror -Wall -Os src/*.c `pkg-config --libs --cflags mm-glib` -o mportlink
gcc -Werror -Wall -Os src/*.c `pkg-config --libs libudev` -o mportlink
```
## Using
Superuser rights are required to work. Start the daemon and connect your USB modem. In `journalctl` you will see his work. Links to the ports of the connected modem will be created in the `/dev/dongle` directory.
```
Dec 21 13:51:02 solus mportlink[17764]: main: starting the mportlink daemon
Dec 21 13:51:26 solus mportlink[17764]: mpl_symlink_ports, dst_path: the symbolic link has been successfully created [/dev/dongle/358**********26-0 -> /dev/ttyUSB0]
Dec 21 13:51:26 solus mportlink[17764]: mpl_symlink_ports, dst_path: the symbolic link has been successfully created [/dev/dongle/358**********26-1 -> /dev/ttyUSB1]
Dec 21 13:51:41 solus mportlink[17764]: mpl_unlink_ports, dst_path: link was successfully deleted [/dev/dongle/358**********26-0]
Dec 21 13:51:41 solus mportlink[17764]: mpl_unlink_ports, dst_path: link was successfully deleted [/dev/dongle/358**********26-1]
Dec 21 13:51:48 solus mportlink[17764]: signals_handler: cancelling the operation...
Dec 21 13:51:48 solus mportlink[17764]: signals_handler: cancelling the main loop...
Dec 21 13:51:48 solus mportlink[17764]: main: stopping the mportlink daemon
```
## To-Do
Currently, the utility is linked to the ModemManager server, through which the connected modems are identified. It is planned to disconnect from this server, as there is a problem with the capture of the device and the unavailability of using Asterisk.

2
services/mportlink.service
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@ -1,6 +1,6 @@
[Unit]
Description=Modem Port Link
After=ModemManager.service
After=
[Service]
ExecStart=/usr/bin/mportlink

41
src/mm.c
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@ -1,41 +0,0 @@
#include "mportlink.h"
MMManager *mmcli_get_manager_finish(GAsyncResult *res)
{
return g_task_propagate_pointer(G_TASK(res), NULL);
}
void manager_new_ready(GDBusConnection *connection, GAsyncResult *res, GTask *task)
{
MMManager *manager;
gchar *name_owner;
GError *error = NULL;
manager = mm_manager_new_finish(res, &error);
if (!manager)
{
syslog(LOG_ERR, "manager_new_ready, manager: couldn't create manager: %s\n", error ? error->message : "unknown error");
exit(EXIT_FAILURE);
}
name_owner = g_dbus_object_manager_client_get_name_owner(G_DBUS_OBJECT_MANAGER_CLIENT(manager));
if (!name_owner)
{
syslog(LOG_ERR, "manager_new_ready, name_owner: couldn't find the ModemManager process in the bus");
exit(EXIT_FAILURE);
}
g_free(name_owner);
g_task_return_pointer(task, manager, g_object_unref);
g_object_unref(task);
}
void mmcli_get_manager(GDBusConnection *connection, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data)
{
GTask *task;
task = g_task_new(connection, cancellable, callback, user_data);
mm_manager_new(connection, G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_DO_NOT_AUTO_START, cancellable, (GAsyncReadyCallback)manager_new_ready, task);
}

11
src/mm.h
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@ -1,11 +0,0 @@
#include <libmm-glib.h>
#include <syslog.h>
typedef struct
{
MMManager *manager;
GCancellable *cancellable;
} Context;
MMManager *mmcli_get_manager_finish(GAsyncResult *res);
void mmcli_get_manager(GDBusConnection *connection, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data);

470
src/mportlink-core.c
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@ -1,253 +1,317 @@
#include "mportlink.h"
#include <stdbool.h>
#include <stdio.h>
#include <unistd.h>
/*
* mportlink-core.c
*
* by Alexander Zhirov (alexander@zhirov.kz)
* Telegram @alexanderzhirov
*/
#include <syslog.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <signal.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "mportlink-lib.h"
#include "mportlink-core.h"
#define LOCKFILE "/run/lock/mportlink.lock"
#define DEV_PATH "/dev/"
#define DONGLE_PATH "/dev/dongle/"
#define DONGLE_PATH (DEV_PATH "dongle/")
typedef struct
#define MPLOG(PRIORITY, fmt, ...) do { \
char buf[256]; \
snprintf(buf, sizeof(buf), fmt __VA_OPT__(,) __VA_ARGS__); \
PRIORITY < LOG_WARNING ? \
syslog(PRIORITY, "%s(): %s (%s)", __func__, buf, \
strerror(errno)) : \
syslog(PRIORITY, "%s(): %s", __func__, buf); \
} while(0)
static void signals_handler(int signum)
{
const gchar *manufacturer;
const gchar *model;
const gchar *imei;
const gchar *device_identifier;
MMModemPortInfo *ports;
guint n_ports;
} MPLmodem;
MPLOG(LOG_WARNING, "cancelling the main loop (%d)", signum);
}
void mpl_create_dongle_dir()
{
struct stat st;
if (stat(DONGLE_PATH, &st) == 0)
{
if (!S_ISDIR(st.st_mode))
{
syslog(LOG_ERR, "mpl_create_dongle_dir: %s exists and is not a directory", DONGLE_PATH);
raise(SIGINT);
if (stat(DONGLE_PATH, &st) == 0) {
if (!S_ISDIR(st.st_mode)) {
MPLOG(LOG_WARNING, "%s exists and is not a directory",
DONGLE_PATH);
exit(EXIT_FAILURE);
}
}
else if (mkdir(DONGLE_PATH, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == -1)
{
syslog(LOG_ERR, "mpl_create_dongle_dir: unable to create a directory %s", DONGLE_PATH);
raise(SIGINT);
} else if (mkdir(DONGLE_PATH,
S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == -1) {
MPLOG(LOG_ERR, "unable to create a directory %s", DONGLE_PATH);
exit(EXIT_FAILURE);
}
}
MPLmodem *mpl_get_new_modem()
int mpl_init()
{
MPLmodem *modem = (MPLmodem *)calloc(1, sizeof(MPLmodem));
openlog(MPL, LOG_PID, LOG_SYSLOG);
if (modem == NULL)
{
syslog(LOG_ERR, "mpl_get_new_modem, modem: memory allocation error");
raise(SIGINT);
int lock_fd = open(LOCKFILE, O_CREAT | O_RDWR, 0644);
if (lock_fd < 0) {
MPLOG(LOG_ERR, "Unable to create a lockfile");
exit(EXIT_FAILURE);
}
return modem;
}
void mpl_free_modem(MPLmodem *modem)
{
if (modem->n_ports && modem->ports)
mm_modem_port_info_array_free(modem->ports, modem->n_ports);
free(modem);
}
void mpl_print_modem_info(MPLmodem *modem, bool connected)
{
gchar *status;
status = connected ? "Connected" : "Disconnected";
g_print("%s %s %s (%s)\n", status, modem->manufacturer, modem->model, modem->device_identifier);
g_print("`-- Count ports: %d\n", modem->n_ports);
for (guint i = 0; i < modem->n_ports; i++)
{
if (i + 1 < modem->n_ports)
{
g_print(" |-- Port %d:\n", i);
g_print(" | |-- Name: %s\n", modem->ports[i].name);
g_print(" | `-- Link: %s-%d\n", modem->imei, i);
}
else
{
g_print(" `-- Port %d:\n", i);
g_print(" |-- Name: %s\n", modem->ports[i].name);
g_print(" `-- Link: %s-%d\n", modem->imei, i);
}
}
}
MPLmodem *mpl_get_new_modem_info(MMObject *obj)
{
MPLmodem *mpl_modem = NULL;
MMModem *mm_modem = mm_object_get_modem(obj);
if (mm_modem == NULL)
{
syslog(LOG_ERR, "mpl_get_new_modem_info, mm_modem: modem does not implement the interface");
return NULL;
int rc = flock(lock_fd, LOCK_EX | LOCK_NB);
if (rc || errno == EWOULDBLOCK) {
MPLOG(LOG_ERR, "Only one instance of %s is allowed", MPL);
exit(EXIT_FAILURE);
}
mpl_modem = mpl_get_new_modem();
mpl_create_dongle_dir();
mpl_modem->manufacturer = mm_modem_get_manufacturer(mm_modem);
mpl_modem->model = mm_modem_get_model(mm_modem);
mpl_modem->imei = mm_modem_get_equipment_identifier(mm_modem);
mpl_modem->device_identifier = mm_modem_get_device_identifier(mm_modem);
MPLOG(LOG_NOTICE, "Starting the %s daemon", MPL);
gboolean success = mm_modem_get_ports(mm_modem, &mpl_modem->ports, &mpl_modem->n_ports);
signal(SIGINT, signals_handler);
signal(SIGHUP, signals_handler);
signal(SIGTERM, signals_handler);
g_object_unref(mm_modem);
if (success)
return mpl_modem;
else
syslog(LOG_WARNING, "mpl_get_new_modem_info, success: error receiving modem ports");
mpl_free_modem(mpl_modem);
return NULL;
return lock_fd;
}
char *mpl_get_dst_path(guint index, const gchar *imei)
int mpl_stop(const int lock_fd)
{
char *dst_path = NULL;
flock(lock_fd, LOCK_UN);
guint size_id = snprintf(NULL, 0, "-%d", index);
char *id = (char *)calloc(size_id + 1, sizeof(char));
if (id == NULL)
{
syslog(LOG_ERR, "mpl_get_dst_path, id: memory allocation error");
raise(SIGINT);
}
sprintf(id, "-%d", index);
guint dst_path_size = strlen(DONGLE_PATH) + strlen(imei) + size_id;
dst_path = (char *)calloc(dst_path_size + 1, sizeof(char));
if (dst_path == NULL)
{
syslog(LOG_ERR, "mpl_get_dst_path, dst_path: memory allocation error");
raise(SIGINT);
}
strcpy(dst_path, DONGLE_PATH);
strcat(dst_path, imei);
strcat(dst_path, id);
free(id);
return dst_path;
MPLOG(LOG_NOTICE, "Stopping the %s daemon", MPL);
closelog();
}
char *mpl_get_src_path(const gchar *port_name)
{
char *src_path = NULL;
guint src_path_size = strlen(DEV_PATH) + strlen(port_name);
src_path = (char *)calloc(src_path_size + 1, sizeof(char));
if (src_path == NULL)
{
syslog(LOG_ERR, "mpl_get_src_path, src_path: memory allocation error");
raise(SIGINT);
}
strcpy(src_path, DEV_PATH);
strcat(src_path, port_name);
// typedef struct
// {
// const gchar *manufacturer;
// const gchar *model;
// const gchar *imei;
// const gchar *device_identifier;
// MMModemPortInfo *ports;
// guint n_ports;
// } MPLmodem;
return src_path;
}
void mpl_symlink_ports(MPLmodem *modem)
{
for (guint i = 0; i < modem->n_ports; i++)
{
char *src_path = mpl_get_src_path(modem->ports[i].name);
char *dst_path = mpl_get_dst_path(i, modem->imei);
struct stat st;
// MPLmodem *mpl_get_new_modem()
// {
// MPLmodem *modem = (MPLmodem *)calloc(1, sizeof(MPLmodem));
if (access(src_path, F_OK) == -1)
{
syslog(LOG_ERR, "mpl_symlink_ports, src_path: device file is not available [%s]", src_path);
free(src_path);
free(dst_path);
continue;
}
// if (modem == NULL)
// {
// syslog(LOG_ERR, "mpl_get_new_modem, modem: memory allocation error");
// raise(SIGINT);
// }
if (lstat(dst_path, &st) == 0)
{
syslog(LOG_WARNING, "mpl_symlink_ports, dst_path: a symbolic link to the device already exists [%s]", dst_path);
if (unlink(dst_path) == -1)
{
syslog(LOG_ERR, "mpl_symlink_ports, dst_path: link could not be deleted [%s]", dst_path);
free(src_path);
free(dst_path);
continue;
}
}
// return modem;
// }
if (symlink(src_path, dst_path) == 0)
syslog(LOG_NOTICE, "mpl_symlink_ports, dst_path: the symbolic link has been successfully created [%s -> %s]", dst_path, src_path);
else
syslog(LOG_ERR, "mpl_symlink_ports, dst_path: error creating a symbolic link [%s -> %s]", dst_path, src_path);
// void mpl_free_modem(MPLmodem *modem)
// {
// if (modem->n_ports && modem->ports)
// mm_modem_port_info_array_free(modem->ports, modem->n_ports);
// free(modem);
// }
free(src_path);
free(dst_path);
}
}
// void mpl_print_modem_info(MPLmodem *modem, bool connected)
// {
// gchar *status;
// status = connected ? "Connected" : "Disconnected";
void mpl_unlink_ports(MPLmodem *modem)
{
for (guint i = 0; i < modem->n_ports; i++)
{
char *dst_path = mpl_get_dst_path(i, modem->imei);
struct stat st;
// g_print("%s %s %s (%s)\n", status, modem->manufacturer, modem->model, modem->device_identifier);
// g_print("`-- Count ports: %d\n", modem->n_ports);
if (lstat(dst_path, &st) == -1)
{
syslog(LOG_WARNING, "mpl_unlink_ports, dst_path: a symbolic link to the device not exists [%s]", dst_path);
free(dst_path);
continue;
}
// for (guint i = 0; i < modem->n_ports; i++)
// {
// if (i + 1 < modem->n_ports)
// {
// g_print(" |-- Port %d:\n", i);
// g_print(" | |-- Name: %s\n", modem->ports[i].name);
// g_print(" | `-- Link: %s-%d\n", modem->imei, i);
// }
// else
// {
// g_print(" `-- Port %d:\n", i);
// g_print(" |-- Name: %s\n", modem->ports[i].name);
// g_print(" `-- Link: %s-%d\n", modem->imei, i);
// }
// }
// }
if (unlink(dst_path) == 0)
syslog(LOG_NOTICE, "mpl_unlink_ports, dst_path: link was successfully deleted [%s]", dst_path);
else
syslog(LOG_ERR, "mpl_unlink_ports, dst_path: link could not be deleted [%s]", dst_path);
// MPLmodem *mpl_get_new_modem_info(MMObject *obj)
// {
// MPLmodem *mpl_modem = NULL;
// MMModem *mm_modem = mm_object_get_modem(obj);
free(dst_path);
}
}
// if (mm_modem == NULL)
// {
// syslog(LOG_ERR, "mpl_get_new_modem_info, mm_modem: modem does not implement the interface");
// return NULL;
// }
void mpl_device_added(MMManager *manager, MMObject *obj)
{
MPLmodem *modem = mpl_get_new_modem_info(obj);
// mpl_modem = mpl_get_new_modem();
if (modem == NULL)
return;
// mpl_modem->manufacturer = mm_modem_get_manufacturer(mm_modem);
// mpl_modem->model = mm_modem_get_model(mm_modem);
// mpl_modem->imei = mm_modem_get_equipment_identifier(mm_modem);
// mpl_modem->device_identifier = mm_modem_get_device_identifier(mm_modem);
// mpl_print_modem_info(modem, true);
mpl_symlink_ports(modem);
// gboolean success = mm_modem_get_ports(mm_modem, &mpl_modem->ports, &mpl_modem->n_ports);
mpl_free_modem(modem);
}
// g_object_unref(mm_modem);
void mpl_device_removed(MMManager *manager, MMObject *obj)
{
MPLmodem *modem = mpl_get_new_modem_info(obj);
// if (success)
// return mpl_modem;
// else
// syslog(LOG_WARNING, "mpl_get_new_modem_info, success: error receiving modem ports");
if (modem == NULL)
return;
// mpl_free_modem(mpl_modem);
// mpl_print_modem_info(modem, false);
mpl_unlink_ports(modem);
// return NULL;
// }
mpl_free_modem(modem);
}
// char *mpl_get_dst_path(guint index, const gchar *imei)
// {
// char *dst_path = NULL;
// guint size_id = snprintf(NULL, 0, "-%d", index);
// char *id = (char *)calloc(size_id + 1, sizeof(char));
// if (id == NULL)
// {
// syslog(LOG_ERR, "mpl_get_dst_path, id: memory allocation error");
// raise(SIGINT);
// }
// sprintf(id, "-%d", index);
// guint dst_path_size = strlen(DONGLE_PATH) + strlen(imei) + size_id;
// dst_path = (char *)calloc(dst_path_size + 1, sizeof(char));
// if (dst_path == NULL)
// {
// syslog(LOG_ERR, "mpl_get_dst_path, dst_path: memory allocation error");
// raise(SIGINT);
// }
// strcpy(dst_path, DONGLE_PATH);
// strcat(dst_path, imei);
// strcat(dst_path, id);
// free(id);
// return dst_path;
// }
// char *mpl_get_src_path(const gchar *port_name)
// {
// char *src_path = NULL;
// guint src_path_size = strlen(DEV_PATH) + strlen(port_name);
// src_path = (char *)calloc(src_path_size + 1, sizeof(char));
// if (src_path == NULL)
// {
// syslog(LOG_ERR, "mpl_get_src_path, src_path: memory allocation error");
// raise(SIGINT);
// }
// strcpy(src_path, DEV_PATH);
// strcat(src_path, port_name);
// return src_path;
// }
// void mpl_symlink_ports(MPLmodem *modem)
// {
// for (guint i = 0; i < modem->n_ports; i++)
// {
// char *src_path = mpl_get_src_path(modem->ports[i].name);
// char *dst_path = mpl_get_dst_path(i, modem->imei);
// struct stat st;
// if (access(src_path, F_OK) == -1)
// {
// syslog(LOG_ERR, "mpl_symlink_ports, src_path: device file is not available [%s]", src_path);
// free(src_path);
// free(dst_path);
// continue;
// }
// if (lstat(dst_path, &st) == 0)
// {
// syslog(LOG_WARNING, "mpl_symlink_ports, dst_path: a symbolic link to the device already exists [%s]", dst_path);
// if (unlink(dst_path) == -1)
// {
// syslog(LOG_ERR, "mpl_symlink_ports, dst_path: link could not be deleted [%s]", dst_path);
// free(src_path);
// free(dst_path);
// continue;
// }
// }
// if (symlink(src_path, dst_path) == 0)
// syslog(LOG_NOTICE, "mpl_symlink_ports, dst_path: the symbolic link has been successfully created [%s -> %s]", dst_path, src_path);
// else
// syslog(LOG_ERR, "mpl_symlink_ports, dst_path: error creating a symbolic link [%s -> %s]", dst_path, src_path);
// free(src_path);
// free(dst_path);
// }
// }
// void mpl_unlink_ports(MPLmodem *modem)
// {
// for (guint i = 0; i < modem->n_ports; i++)
// {
// char *dst_path = mpl_get_dst_path(i, modem->imei);
// struct stat st;
// if (lstat(dst_path, &st) == -1)
// {
// syslog(LOG_WARNING, "mpl_unlink_ports, dst_path: a symbolic link to the device not exists [%s]", dst_path);
// free(dst_path);
// continue;
// }
// if (unlink(dst_path) == 0)
// syslog(LOG_NOTICE, "mpl_unlink_ports, dst_path: link was successfully deleted [%s]", dst_path);
// else
// syslog(LOG_ERR, "mpl_unlink_ports, dst_path: link could not be deleted [%s]", dst_path);
// free(dst_path);
// }
// }
// void mpl_device_added(MMManager *manager, MMObject *obj)
// {
// MPLmodem *modem = mpl_get_new_modem_info(obj);
// if (modem == NULL)
// return;
// // mpl_print_modem_info(modem, true);
// mpl_symlink_ports(modem);
// mpl_free_modem(modem);
// }
// void mpl_device_removed(MMManager *manager, MMObject *obj)
// {
// MPLmodem *modem = mpl_get_new_modem_info(obj);
// if (modem == NULL)
// return;
// // mpl_print_modem_info(modem, false);
// mpl_unlink_ports(modem);
// mpl_free_modem(modem);
// }

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src/mportlink-core.h Normal file
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/*
* mportlink-core.h
*
* by Alexander Zhirov (alexander@zhirov.kz)
* Telegram @alexanderzhirov
*/
#ifndef MPL_CORE_H_
#define MPL_CORE_H_
#include <stdlib.h>
#define MPL "mportlink"
int mpl_init();
int mpl_stop(const int lock_fd);
#endif

8
src/mportlink-lib.c Normal file
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/*
* mportlink-lib.c
*
* by Alexander Zhirov (alexander@zhirov.kz)
* Telegram @alexanderzhirov
*/
#include "mportlink-lib.h"

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src/mportlink-lib.h Normal file
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/*
* mportlink-lib.h
*
* by Alexander Zhirov (alexander@zhirov.kz)
* Telegram @alexanderzhirov
*/
#ifndef MPL_LIB_H_
#define MPL_LIB_H_
#endif

91
src/mportlink.c
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@ -1,90 +1,17 @@
/*
* mportlink.c
*
* by Alexander Zhirov (alexander@zhirov.kz)
* Telegram @alexanderzhirov
*/
#include "mportlink.h"
#include <sys/file.h>
#include <fcntl.h>
#define LOCKFILE "/run/lock/mportlink.lock"
#define MPL "mportlink"
static Context *ctx;
static GCancellable *cancellable;
static GMainLoop *loop;
static void signals_handler(int signum)
{
if (cancellable)
{
if (!g_cancellable_is_cancelled(cancellable))
{
syslog(LOG_WARNING, "signals_handler: cancelling the operation...");
g_cancellable_cancel(cancellable);
}
}
if (loop && g_main_loop_is_running(loop))
{
syslog(LOG_WARNING, "signals_handler: cancelling the main loop...");
g_main_loop_quit(loop);
}
}
static void get_manager_ready(GObject *source, GAsyncResult *result, gpointer none)
{
ctx->manager = mmcli_get_manager_finish(result);
g_signal_connect(ctx->manager, "object-added", G_CALLBACK(mpl_device_added), NULL);
g_signal_connect(ctx->manager, "object-removed", G_CALLBACK(mpl_device_removed), NULL);
}
int main()
{
openlog(MPL, LOG_PID, LOG_SYSLOG);
int lock_fd = mpl_init();
int lock_fd = open(LOCKFILE, O_CREAT | O_RDWR, 0666);
int rc = flock(lock_fd, LOCK_EX | LOCK_NB);
if (rc || errno == EWOULDBLOCK)
{
syslog(LOG_ERR, "main: only one instance of %s is allowed", MPL);
exit(EXIT_FAILURE);
}
syslog(LOG_NOTICE, "main: starting the %s daemon", MPL);
mpl_create_dongle_dir();
GError *error = NULL;
GDBusConnection *connection = NULL;
signal(SIGINT, signals_handler);
signal(SIGHUP, signals_handler);
signal(SIGTERM, signals_handler);
connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &error);
if (!connection)
{
syslog(LOG_ERR, "main, connection: couldn't get bus: %s", error->message);
exit(EXIT_FAILURE);
}
cancellable = g_cancellable_new();
loop = g_main_loop_new(NULL, FALSE);
ctx = g_new0(Context, 1);
if (cancellable)
ctx->cancellable = g_object_ref(cancellable);
mmcli_get_manager(connection, cancellable, (GAsyncReadyCallback)get_manager_ready, NULL);
g_main_loop_run(loop);
if (cancellable)
g_object_unref(cancellable);
g_main_loop_unref(loop);
g_object_unref(connection);
flock(lock_fd, LOCK_UN);
syslog(LOG_NOTICE, "main: stopping the %s daemon", MPL);
closelog();
mpl_stop(lock_fd);
return EXIT_SUCCESS;
}

17
src/mportlink.h
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@ -1,5 +1,14 @@
#include "mm.h"
/*
* mportlink.h
*
* by Alexander Zhirov (alexander@zhirov.kz)
* Telegram @alexanderzhirov
*/
void mpl_create_dongle_dir();
void mpl_device_added(MMManager *manager, MMObject *obj);
void mpl_device_removed(MMManager *manager, MMObject *obj);
#ifndef MPL_H_
#define MPL_H_
#include "mportlink-lib.h"
#include "mportlink-core.h"
#endif